Equipments for bending reinforcing irons of concrete or the like



Dec. 13, 1960 E. GHIRINGHELLI 2,964,085 EQUIPMENTS FOR BENDING REINFORCING mous 0F CONCRETE OR THE LIKE Filed Dec. 21, 1956 3 Sheets-Sheet l 13,1960 E. .GHIRINGHELLI 2,964,085

- EQUIPMENTS FOR BENDING REINFORCING IRONS 0F CONCRETE OR THE LIKE Filed Dec. 21, 1956 3 Sheets Sheet 2 o N 7 2 33 Q H LO i I m \l P g LL $1 I Dec 13 1960 GHIRINGHELLI 2 964 EQUIPMENTS FOR BENDING REINFORCING IRONS 0F CONCRETE OR THE LIKE Filed Dec 21. 1958 3 Sheets-Sheet 3 E GJZL'P ZLL' United States Patent EQUIPMENTS FOR BENDING REINFORCING IRONS OF CONCRETE OR THE LIKE Enrico Ghiringhelli, 66 F oro Bonaparte, Milan, Italy Filed Dec. 21, 1956, Ser. No. 629,819

Claims priority, application Italy Dec. 21, 1955 2 Claims. (Cl. 153-4) This invention relates generally to equipment for the bending and shaping of the iron rods which are normally used for the reinforcement of concrete.

More particularly, the invention relates to the fabrication of standard concrete reinforcing irons.

In the drawings:

Fig. 1 shows a diagrammatic View of the equipment according to the invention.

Fig. 2 is an elevation of the left half of the equipment, the right half thereof being identical thereto.

Fig. 3 is a plan view of Fig. 2.

Fig. 4 is a vertical section, taken along the axis of the actuating means of the first bending unit.

Fig. 5 is a vertical section taken along the axis of the crank of the second bending unit, and

Figs. 6 and 7 respectively are vertical sections taken along the axis of the actuating means, and through the crank of the third bending unit.

Referring now to the above figures, wherein like reference characters indicate identical parts throughout the several views, and more particularly to Fig. 1 whereon the equipment is shown as consisting of bases A and A which could be made of concrete and whereon the bending units B--C and B C are respectively fitted.

As illustrated, double bending units are provided in order to obtain simultaneously a number of reinforcement irons showing three double bends, arranged in a symmetrical manner on both ends, thus giving the characteristics as required for ceilings or beams.

The two bending units BC and B C are connected to one another in the manner as hereinafter specified, in order to act as two symmetrical units when required by the shape of reinforcing irons. The spacing can be adjusted according to the length of reinforcing irons.

The bending unit B includes a mounting frame 10 (see also Fig. 5), provided with wheels 12, which cooperate with suitable rails 14, as fitted on the base A. The boxsection mounting 10 consists of an upper plane 16, acting as a work table, and is provided with clamps 18, to engage with connecting rods 20, secured to the frame of the bending unit C. Such rods can be locked to the mounting 10 by operation of the lock levers 22, with which the clamps '18 are provided.

A first bending die consisting of a cylinder-piston set 24 is secured to mounting 10 by means of the vertical pivot 26, and its piston-rod 28 is hinge-connected to a lever 30, secured to a hollow gudgeon pin 32, and supported by the mounting 10. A crank arm 36, provided on its end with a pin 38, is secured onto the upper end of gudgeon pin 32.

A rod 40, slidingly fitted in the bore of gudgeon pin 32, is connected with the piston of a cylinder-piston set 24, as fitted on the lower section of mounting 10. The aforedescribed members (that is, crank 36, pin 38 and rod 40) form together one of the three bending units of the equipment.

The second bending die or unit also consists (see Fig.

4) of a pin 48 secured to a crank 44 keyed ona gudgeon pin 46, provided with a pin 48 and secured onto one of its ends in a position opposite to that of pin 42. The crank 44 is linked with the cylinder-piston set 54 which, as in the case of set 24, can be rotated around a pivot 56 by means of a lever 50.

The aforedescribed member, which is made-up by the second bending unit, is supported by an auxiliary box section mounting 60; provided with horizontal guides, which cooperate with auxiliary guides 62 fitted on the main mounting 10. Guides 62 are fitted in a convenient direction in respect to the longitudinal axis of the rails 14 to allow the irons to be bent in the required manner, that is, they are parallelly arranged (see Fig. 3) as to be tangent to pins 10-48, which are also conveniently inclined with respect to the longitudinal axis of the equipment.

The auxiliary mounting 60 is moved along the guides 62 by means of a control handwheel 64, secured to a threaded spindle 66, associated with a nut 68 secured to the mounting 10, whereby the distance between the centers of pins 40 and 48 can be suitably adjusted.

As shown in Fig. 2, the work plane of the auxiliary mounting 60 and the work plane 16 of the main mounting 10 are both at the same level.

A clamping unit for the rods F, fitted in front of pins 4248, consists of a fixed jaw 70 secured to mounting 60, and of a movable jaw '72 associated with a suitable clamping device 74, as for instance a screw-andnut device, or a cylinder-piston-set.

The bending unit C is likewise made-up of a frame 76 provided with wheels '78 running on the guide rails 14 and ending with an upright fitted with guides 80, along which an auxiliary platform 82 can be raised or lowered by means of a cylinder-piston set 8684 fitted to main mounting 76. Mounting 82 comprises a cylinder-piston set (see also Fig. 6), land a strap 90, secured to piston rod 88 thereof, is slidingly fitted between suitable guides 92, as formed inside auxiliary mounting 82.

A roller 96, is fitted by means of journal 94 onto strap 99 and cooperates with a plurality of flexible members 98, as for instance cables or ropes, and one end thereof is secured by means of pins 100 in a suitable position on the mounting 82, whereas the opposite ends of same members 98 are partly wound on a grooved drum 102 (see also Fig. 7) and attached thereto by means of pins 104.

The drum 102 is keyed on a shaft 106, vertically supported in the mounting 82 and provided with a pin 108, secured to its lower end and holding one end of a coil spring 110, the opposite end of which is fastened, by means of adjustable clamp 102, to mounting 82.

A crank 114, keyed to shaft 106, is provided with a pin 116 secured to one of its ends and is associated with a like pin 118 also secured thereto.

The axes of pins 116 and 40 are aligned with one another and are substantially parallelly arranged to guide rods 20, that is to the longitudinal axis of the equipment. A holding and clamping device 120 for the irons which are to be bent is fitted on mounting 82 along the line that passes through the axes and, more precisely, near the end where the pin 40 is fitted, is associated with a fork 122 provided with adjustable arms.

The operation of the equipment will now be described.

First, the equipment is adjusted according to the bends which are to be made, by properly setting the distance between the right and left units B and C, thereby varying the distance between the centers of pins 40 and 116.

Then the distance between the centers of pins 40-48 is suitably adjusted by means of the handwheel 64.

After the above operation, a plurality of irons F, of the required length, are brought in between the jaws of F 1C Patented Dec. 13,; 1960.

2,964,085 p r y clamp 72, superposing them on one another in such a I manner that their ends are threaded between the pins 42-48 of crank 44.

Then the pressure fluid is fed into the cylinder-piston set 54, whereby a clockwise rotation of a given angle is imparted to crank 44 (see Fig. 3) in order to perform the first bending operation F the pin is thereby moved from the position 42, to position 42.

While performing the aforedescn'bed operation the platform 82 and also the rod -40 associated with the crank 36, are held in the lower position whereby both ends of irons F are free to move.

After the end of the above-described first bending operation, the ends of irons F are all inclined upwards, as shown in Figs. 1 to 3, and near pin 38, or more precisely between the latter pin and the rod 40 of crank 36. a

Them-the piston 47 is actuated in order to raise the rod 40 and to engage the pin 38 against the bars F, for further bending.

The cylinder-piston set 24 is then actuated, whereby the crank 36 rotates in counter-clockwise direction (see Fig. 3), in order to carry out the bending F by which the ends of irons F are brought parallel to the middle section thereof, whereas the end sections corresponding to clamping devices 120 of auxiliary mounting 82 are held lowered. Then, the cylinder-piston set 86 is actuated to raise the auxiliary mounting 83 to the same level of plane 16, thereby engaging the ends of irons F between the arms of fork 122 and with the clamping device 120 (which is left open) as well as between the pins 1l6118 (being latter pin in the position 118'), whereupon the clamping device 120 is locked and the cylinder-piston set 84 is actuated, thereby moving the strap 90, together with the grooved drum 96. This causes unwinding of the flexible cable element S8 from grooved drum 102, and the crank 114 rotates in a counter-clockwise direction for about 180, thereby causing the ends P of irons F to be bent in the shape of a hook.

At the end of the above operations, the clamping devices 72 and 120 are released, and the cylinder-piston sets 244254-8486 are actuated in a direction opposite to the preceding one, to reset them. A new charge of irons is substituted and the equipment can then be re-started for a new cycle of operations.

The return of stroke of cylinder-piston set 85 is performed under the action of spring 110, and a similar result follows for the other sets, as for instance the return cylinder-piston set 54, by action of return spring 55.

While the invention has been described with some details it is to be understood that the description is for the purpose of illustration only, and is not definitive of the limits of the inventive idea. The right is reserved to make such changes in the details of construction and arrangements of parts, as will fall within the scope of the attached claims.

I claim:

1. Apparatus for bending rods comprising a base track; a first vehicle movably positioned on said track, said vehicle including a first Work table fixedly mounted thereon, first initially ineffective rod bending crank arm means to receive one end of the rods and rotatably mounted on said first table, said crank arm means having a part initially withdrawn, means for effecting a preselected angular rotation of said first rod bending means, means to move the withdrawn part into operating condition, a second work table movably mounted on said first vehicle in the same horizontal plane as said first work table, second rod bending crank arm means to receive an intermediate portion of the rods and rotatably mounted on said second table, means for effecting a preselected angular rotation of said second rod bending means, means for adjusting the horizontal spatial distance between said tables in a direction transverse to said track; and a second vehicle movably positioned on said track, said second vehicle including a third work table initially under said horizontal plane, third-rod bending means to receive the other end of the rods and rotatably mounted on said third table, means for effecting a preselected angular rotation of said third rod bending means, means to raise said third table to said horizontal plane, and means interconnecting said vehicles for effecting a preselected spatial displacement between said vehicles on said track.

2. Apparatus for bending rods comprising a base track; a first vehicle movably arranged on said track, said vehicle including a first work table movably mounted thereon, a bar clamping device arranged on said first table, a first rod bending unit to receive one end of the rods and pivotally arranged on said table, fluid pressure actuated means arranged on said first table for effecting a preselected angular rotation of said first rod bending unit, a second work table fixedly mounted on said vehicle, a second rod bending unit to receive an intermediate portion of the rods and pivotally arranged on said second table having a part thereof withdrawn into an initially inelfective condition, fluid pressure actuated means arranged on said second table to move the withdrawn part into eifective condition, fluid pressure actuated means arranged on said second table and connected to said second unit for effecting a preselected angular rotation thereof, manually actuated means for selectively varying the tangential distance between the pivotal axis of said first and second rod bending units; and a second vehicle movably arranged on said track, said second vehicle including a third work table movably mounted thereon, fluid pressure actuated means arranged on said second vehicle for selectively varying the level of said third work table whereby the third work table is made coplanar with the first and second work table, a bar clamping device arranged on said third table, a third rod bending unit to receive the other end of the rods and pivotally arranged on said third table, the pivotal axis of said second and third rod bending units and said last recited bar clamping device being in the same vertical plane, fluid pressure actuated means arranged on said third table for effecting a preselected angular rotation of said third rod bending unit, and means slidably interconnecting said vehicles for effecting a predetermined spatial displacement of said vehicles on said track.

References (lited in the file of this patent UNITED STATES PATENTS 898,424 Bartlett Sept. 15, 1908 1,066,247 Brown July 1, 1913 2,128,620 Lyons Aug. 30, 1938 2,414,926 Burke Jan. 28, 1947 2,661,786 Peddinghaus Dec. 8, 1953 

